The mass of a single HE atom is 6.65e-27kg. You have 5.00e-6 mole of HE gas which is occupying a volume of 1.00e-4m^3. when at pressure of 100Pa. Determine the temp of gas AND the average speed of the gas molecules.
**I've found the temp of gas i need help on the avg speed - i believe i'm close
The Attempt at a Solution
i'm not certain if i use 6.65e-27kg as molar mass?